1. Department of Otolaryngology‐Head and Neck Surgery, College of Medicine Hanyang University Seoul Republic of Korea
2. Department of Otolaryngology‐Head and Neck Surgery, Kaohsiung Medical University Hospital Faculty of Medicine, College of Medicine, Kaohsiung Medical University Kaohsiung Taiwan
3. Department of Otolaryngology‐Head and Neck Surgery, E‐Da Hospital, I‐Shou University School of Medicine, College of Medicine, I‐Shou University Kaohsiung Taiwan